WP-0015: complete compose acceptance after Gitea visibility fix

Refresh federated index (20 capabilities, 0 duplicate warnings). Update
workplan, SCOPE, gap analysis, and tests for 59/60 publish pass. Mark
T04/T06 done; T01 remains on tegwick-control repo creation.

Note: production hub whynot URLs still need REUSE_SURFACE_TOKEN update.

registry/indexes/federated.yaml

@@ -206,7 +206,7 @@ sources:
   url: https://gitea.coulomb.social/coulomb/repo-seed/raw/main/registry/indexes/capabilities.yaml
   cache: registry/federation/cache/repo-seed.yaml
 - repo: reuse-surface
-  count: 3
+  count: 2
   url: https://gitea.coulomb.social/coulomb/reuse-surface/raw/main/registry/indexes/capabilities.yaml
   cache: registry/federation/cache/reuse-surface.yaml
 - repo: shard-wiki
@@ -260,24 +260,6 @@ capabilities:
   source_repo: activity-core
   source_url: https://gitea.coulomb.social/coulomb/activity-core/raw/main/registry/indexes/capabilities.yaml
   source_index: registry/federation/cache/activity-core.yaml
-- id: capability.activity.event-coordinate
-  name: Organizational Event Coordination
-  summary: Coordinate structured responses to cross-domain events through activity
-    workflows and automation.
-  vector: D3 / A1 / C1 / R0
-  domain: helix_forge
-  status: draft
-  owner: activity-core
-  path: registry/capabilities/capability.activity.event-coordinate.md
-  tags:
-  - activity
-  - coordination
-  - automation
-  consumption_modes:
-  - informational
-  source_repo: reuse-surface
-  source_url: https://gitea.coulomb.social/coulomb/reuse-surface/raw/main/registry/indexes/capabilities.yaml
-  source_index: registry/federation/cache/reuse-surface.yaml
 - id: capability.audit.event-retain
   name: Audit Event Retention
   summary: Collect, normalize, retain, and search audit events with integrity evidence